Description Feature: 1. Digital thermometer allows you to closely monitor the right temperature of fish tank or refrigerator. 2. This thermometera with a digital screen that displays reading in both Fahrenheit and Celsius. 3. The refrigerator thermometer can be turned off by click the switch button to save electricity, easy to operate. 4. With magnets and hooks on the back of the product and the magnets can adsorb on the iron covers. 5. This temperature gauge can be used for both fish tank and refrigerator with accuracy measurement. Specification: Condition: 100% Brand NewItem Type: ThermometerMaterial: PlasticColor: As Picture ShownProduct Length Without Hook: Approx. 6.8cm/2.7inProduct Width Without Hook : Approx. 4.3cm/1.7inProduct Thickness Without Hook: Approx. 2.5cm/1.0inProduct Length With Hook: Approx. 6.8cm/2.7inProduct Width With Hook : Approx. 6.1cm/2.4inProduct Thickness With Hook: Approx. 1.4cm/0.6inWeight: Approx. 40.0g/1.4ozBattery Type: 200mAh Button Battey(Ship with Battery)Battery Model: CR2030 When the temperature is lower than -20, it will display: LL.L Suitable Type: Aquarium, Refrigerator, etc. Product Function: Used for temperature monitoring 1. Temperature Range: -20~60 (-4F~140F) 2. ON/OFF (Electrical on/off function switch button) 3. /F (Electrical Celsius/Fahrenheit function switch button, default Celsius, you can contact customer service to customize the default Fahrenheit) When the temperature is higher than 60C, it will display: HH.H 2. Frost Alarm: When the temperature is within the range of 4.0C (39.2F) to 7.9C (46.2F), the snowflake icon will appear on the screen. 3. Operation Instructions: The refrigerator thermometer can be turned off by the switch button to save electricity. Fahrenheit and Celsius key conversion. With magnets and hooks on the back of the product, the magnets can adsorb the iron cover. Package List: 1 x Thermometer